Registro DMARC
v=DMARC1;p=reject;fo=1;rua=mailto:dmarc_rua@emaildefense.proofpoint.com;ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: securityfocus.com
class: IN
ttl: 350
type: SOA
mname: amrns1501.accenture.com
rname: dnsadmin.accenture.com
serial: 4433
refresh: 10800
retry: 1080
expire: 2419200
minimum-ttl: 900